Formal languages | Models of computation | Automata (computation)

Deterministic pushdown automaton

In automata theory, a deterministic pushdown automaton (DPDA or DPA) is a variation of the pushdown automaton. The class of deterministic pushdown automata accepts the deterministic context-free languages, a proper subset of context-free languages. Machine transitions are based on the current state and input symbol, and also the current topmost symbol of the stack. Symbols lower in the stack are not visible and have no immediate effect. Machine actions include pushing, popping, or replacing the stack top. A deterministic pushdown automaton has at most one legal transition for the same combination of input symbol, state, and top stack symbol. This is where it differs from the nondeterministic pushdown automaton. (Wikipedia).

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Pushdown Machines

Theory of Computation 7. Pushdown Machines ADUni

From playlist [Shai Simonson]Theory of Computation

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4. Pushdown Automata, Conversion of CFG to PDA and Reverse Conversion

MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Defined context free grammars (CFGs) a

From playlist MIT 18.404J Theory of Computation, Fall 2020

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Simple Machines (1 of 7) Pulleys; Defining Forces, Distances and MA

For the pulley simple machine this video defines the terms input and output force, input and output distance and mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mechanis

From playlist Mechanics

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How did Automatic Transmissions Beat Out Manuals?

For ages, manual transmissions were the best way to control the shifting in cars, but recent advances have made the automatic dominant. Manual transmissions are, unfortunately, become a dying a breed in the US, but let’s look at why. Automatic transmissions were invented by GM in the 193

From playlist Concerning History

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Spring toggle mechanism 9

Spring toggle mechanism enables to reach end positions of a lever quickly and holds it there firmly. The pink double crank represents action from outside.

From playlist Mechanisms

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Verónica Becher: Independence of normal words

Abstract : Recall that normality is a elementary form of randomness: an infinite word is normal to a given alphabet if all blocks of symbols of the same length occur in the word with the same asymptotic frequency. We consider a notion of independence on pairs of infinite words formalising

From playlist Logic and Foundations

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Theory of Computation Recitation 5

Theory of Computation Recitation 5 aduni

From playlist [Shai Simonson]Theory of Computation

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Simple Machines (3 of 7) Pulleys; Calculating Forces, Distances, MA, Part 2

For the pulley simple machine shows how to calculate the input force, input distance and the mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechani

From playlist Mechanics

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27c3: Hackers and Computer Science (en)

Speaker: Sergey Although most academics and industry practitioners regard "hacking" as mostly ad-hoc, a loose collection of useful tricks essentially random in nature, I will argue that hacking has in fact become a "distinct research and engineering discipline" with deep underlying engine

From playlist 27C3: We come in peace

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Simple Machines (2 of 7) Pulleys; Calculating Distances, Forces, MA, Part 1

For the pulley simple machine shows how to calculate the input and output distances, the input and output forces and mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mech

From playlist Mechanics

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Simple Machines (4 of 7) Pulleys; Calculating the Amount of Work Done

For the pulley simple machine shows how to calculate the amount of work done when raising an object and why simple machines do not make your work easier! A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as th

From playlist Mechanics

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6. TM Variants, Church-Turing Thesis

MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Showed that various TM variants are al

From playlist MIT 18.404J Theory of Computation, Fall 2020

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Theory of Computation Recitation 4

Theory of Computation Recitation 4 aduni

From playlist [Shai Simonson]Theory of Computation

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Slider crank mechanism with satellite pulley

The diameter of the big pulley is double the one of the green pulley. The length of each crank = R The slider's stroke = 4R The belt should be toothed. It is possible to use chain drive instead of belt one. STEP files of this video: http://www.mediafire.com/file/frn0cmys8sedruy/SliderCrank

From playlist Mechanisms

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CFGs and NPDMs

Theory of Computation 8. CFGs and NPDMs ADUni

From playlist [Shai Simonson]Theory of Computation

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Torque Converter, How does it work?

Most of us enjoy the smooth and effortless feeling of driving in an automatic transmission car. The driving is effortless because you don’t need to worry about gear changing and you don’t have a clutch pedal to operate. In an automatic transmission car the work, of the clutch pedal, is aut

From playlist Automobile Engineering

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ElixirConf 2015 - The road to intellij-elixir 1.0.0 By Luke Imhoff

Learn how naively copying a grammar file from one parser generator to another won't work. Go back to the beginning and learn about lexers vs parsers, but discover that the power of interpolation changes the computational complexity and forces the lexer to be a push-down automata instead of

From playlist ElixirConf 2015

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Vane Pump

http://www.mekanizmalar.com A rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside of a cavity.

From playlist Pumps

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10. Computation History Method

MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Defined configurations and computation

From playlist MIT 18.404J Theory of Computation, Fall 2020

Related pages

Palindrome | Pushdown automaton | Kleene star | Context-free language | Gödel Prize | Empty string | Deterministic context-free language | Power set | Automata theory